add missing context in rpc call of window wizard creation for issue1842

(transplanted from 8deb3010f9a00331384e0effbcdc2bb234ce6838)

tryton/gui/window/wizard.py

@@ -48,7 +48,7 @@ class Wizard(SignalEvent):
         self.context = context
         if not 'form' in datas:
             datas['form'] = {}
-        args = ('wizard', action, 'create')
+        args = ('wizard', action, 'create', rpc.CONTEXT)
         try:
             self.wiz_id = rpc.execute(*args)
         except Exception, exception: